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Check in implementation of foreign key constraints.

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FossilOrigin-Name: d5d399811876391642937edeb9e8434dd9e356f5
This commit is contained in:
dan
2009-09-19 17:00:31 +00:00
parent 3991bb0dee
commit 1da40a381f
27 changed files with 1698 additions and 182 deletions
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31
src/sqliteInt.h
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@@ -670,6 +670,7 @@ struct Schema {
Hash tblHash; /* All tables indexed by name */
Hash idxHash; /* All (named) indices indexed by name */
Hash trigHash; /* All triggers indexed by name */
Hash fkeyHash; /* All foreign keys by referenced table name */
Table *pSeqTab; /* The sqlite_sequence table used by AUTOINCREMENT */
u8 file_format; /* Schema format version for this file */
u8 enc; /* Text encoding used by this database */
@@ -860,6 +861,9 @@ struct sqlite3 {
int nSavepoint; /* Number of non-transaction savepoints */
int nStatement; /* Number of nested statement-transactions */
u8 isTransactionSavepoint; /* True if the outermost savepoint is a TS */
#ifndef SQLITE_OMIT_FOREIGN_KEY
i64 nDeferredCons; /* Net deferred constraints this transaction. */
#endif
#ifdef SQLITE_ENABLE_UNLOCK_NOTIFY
/* The following variables are all protected by the STATIC_MASTER
@@ -916,6 +920,7 @@ struct sqlite3 {
#define SQLITE_RecoveryMode 0x00040000 /* Ignore schema errors */
#define SQLITE_ReverseOrder 0x00100000 /* Reverse unordered SELECTs */
#define SQLITE_RecTriggers 0x00200000 /* Enable recursive triggers */
#define SQLITE_ForeignKeys 0x00400000 /* Enforce foreign key constraints */
/*
** Possible values for the sqlite.magic field.
@@ -1002,6 +1007,7 @@ struct FuncDef {
*/
struct Savepoint {
char *zName; /* Savepoint name (nul-terminated) */
int nDeferredCons; /* Number of deferred fk violations */
Savepoint *pNext; /* Parent savepoint (if any) */
};
@@ -1281,11 +1287,15 @@ struct FKey {
Table *pFrom; /* The table that contains the REFERENCES clause */
FKey *pNextFrom; /* Next foreign key in pFrom */
char *zTo; /* Name of table that the key points to */
FKey *pNextTo; /* Next foreign key on table named zTo */
FKey *pPrevTo; /* Previous foreign key on table named zTo */
int nCol; /* Number of columns in this key */
u8 isDeferred; /* True if constraint checking is deferred till COMMIT */
u8 updateConf; /* How to resolve conflicts that occur on UPDATE */
u8 deleteConf; /* How to resolve conflicts that occur on DELETE */
u8 insertConf; /* How to resolve conflicts that occur on INSERT */
Trigger *pOnUpdate; /* Trigger for AFTER UPDATE ON zTo */
Trigger *pOnDelete; /* Trigger for AFTER DELETE ON zTo */
struct sColMap { /* Mapping of columns in pFrom to columns in zTo */
int iFrom; /* Index of column in pFrom */
char *zCol; /* Name of column in zTo. If 0 use PRIMARY KEY */
@@ -2586,7 +2596,7 @@ void sqlite3SrcListShiftJoinType(SrcList*);
void sqlite3SrcListAssignCursors(Parse*, SrcList*);
void sqlite3IdListDelete(sqlite3*, IdList*);
void sqlite3SrcListDelete(sqlite3*, SrcList*);
void sqlite3CreateIndex(Parse*,Token*,Token*,SrcList*,ExprList*,int,Token*,
Index *sqlite3CreateIndex(Parse*,Token*,Token*,SrcList*,ExprList*,int,Token*,
Token*, int, int);
void sqlite3DropIndex(Parse*, SrcList*, int);
int sqlite3Select(Parse*, Select*, SelectDest*);
@@ -2694,6 +2704,7 @@ void sqlite3MaterializeView(Parse*, Table*, Expr*, int);
Trigger *sqlite3TriggerList(Parse *, Table *);
void sqlite3CodeRowTrigger(Parse*, Trigger *, int, ExprList*, int, Table *,
int, int, int, int);
void sqlite3CodeRowTriggerDirect(Parse *, Trigger *, Table *, int, int, int);
void sqliteViewTriggers(Parse*, Table*, Expr*, int, ExprList*);
void sqlite3DeleteTriggerStep(sqlite3*, TriggerStep*);
TriggerStep *sqlite3TriggerSelectStep(sqlite3*,Select*);
@@ -2703,7 +2714,7 @@ void sqlite3MaterializeView(Parse*, Table*, Expr*, int);
TriggerStep *sqlite3TriggerDeleteStep(sqlite3*,Token*, Expr*);
void sqlite3DeleteTrigger(sqlite3*, Trigger*);
void sqlite3UnlinkAndDeleteTrigger(sqlite3*,int,const char*);
u32 sqlite3TriggerOldmask(Parse*,Trigger*,int,ExprList*,Table*,int);
u32 sqlite3TriggerOldmask(Parse*,Trigger*,ExprList*,Table*,int);
# define sqlite3ParseToplevel(p) ((p)->pToplevel ? (p)->pToplevel : (p))
#else
# define sqlite3TriggersExist(B,C,D,E,F) 0
@@ -2713,7 +2724,7 @@ void sqlite3MaterializeView(Parse*, Table*, Expr*, int);
# define sqlite3CodeRowTrigger(A,B,C,D,E,F,G,H,I,J)
# define sqlite3TriggerList(X, Y) 0
# define sqlite3ParseToplevel(p) p
# define sqlite3TriggerOldmask(A,B,C,D,E,F) 0
# define sqlite3TriggerOldmask(A,B,C,D,E) 0
#endif
int sqlite3JoinType(Parse*, Token*, Token*, Token*);
@@ -2931,7 +2942,19 @@ CollSeq *sqlite3BinaryCompareCollSeq(Parse *, Expr *, Expr *);
int sqlite3TempInMemory(const sqlite3*);
VTable *sqlite3GetVTable(sqlite3*, Table*);
#ifndef SQLITE_OMIT_FOREIGN_KEY
void sqlite3FkCheck(Parse*, Table*, ExprList*, int, int);
void sqlite3FkActions(Parse*, Table*, ExprList*, int);
void sqlite3FkDelete(Table*);
int sqlite3FkRequired(Parse*, Table*, ExprList*);
u32 sqlite3FkOldmask(Parse*, Table*, ExprList*);
#else
#define sqlite3FkCheck(a,b,c,d,e)
#define sqlite3FkActions(a,b,c,d)
#define sqlite3FkDelete(a)
#define sqlite3FkRequired(a,b,c) 0
#define sqlite3FkOldmask(a,b,c) 0
#endif
/*
** Available fault injectors. Should be numbered beginning with 0.